diff --git a/jenkins.sh b/jenkins.sh
index 1e281fa016..3b4e31fd7f 100755
--- a/jenkins.sh
+++ b/jenkins.sh
@@ -13,7 +13,7 @@ set -x
 npm install
 
 # we may be using a dev branch of js-sdk in which case we need to build it
-(cd node_modules/matrix-js-sdk && npm run build)
+(cd node_modules/matrix-js-sdk && npm install)
 
 # run the mocha tests
 npm run test